In and Out of Focus

The colouring method used for this fractal is a bit tricky it lacks definition at low iterations and becomes sharper as more and and more of the shapes appear. So the consequence is that for some pictures some areas appear to be out of focus, others are sharply defined and are in focus. If the processing is allowed to continue it all becomes a confused mess.

Created using mars and expanded using phobos (see my deviantID).

Parameters
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Formula: Uzduccpac Julia

z <- (unsign(z)/unsign(beta))^alpha + beta

alpha = 1 - 1.75i
beta = -1.2 - 2.0i

Bailout limit: 1600
Max. iterations: 20
Image centre: 0 + 0i
Long side: 80

Outer colouring: all points are inner
Inner colouring: magnitude, exponential sum